diff options
Diffstat (limited to 'src/test/ui/transmutability/visibility/should_accept_if_src_has_unreachable_ty.rs')
-rw-r--r-- | src/test/ui/transmutability/visibility/should_accept_if_src_has_unreachable_ty.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/transmutability/visibility/should_accept_if_src_has_unreachable_ty.rs b/src/test/ui/transmutability/visibility/should_accept_if_src_has_unreachable_ty.rs new file mode 100644 index 000000000..1943fb871 --- /dev/null +++ b/src/test/ui/transmutability/visibility/should_accept_if_src_has_unreachable_ty.rs @@ -0,0 +1,39 @@ +//! The presence of an unreachable source type (i.e., the source type is +//! private) does not affect transmutability. (This rule is distinct from type +//! privacy, which still may forbid naming such types.) + +#![crate_type = "lib"] +#![feature(transmutability)] +#![allow(dead_code)] + +mod assert { + use std::mem::BikeshedIntrinsicFrom; + + pub fn is_transmutable<Src, Dst, Context>() + where + Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, false> + // visibility is NOT assumed ---------------------------------^^^^^ + {} +} + +mod src { + #[repr(C)] pub(in super) struct Zst; + + // unreachable type + #[repr(C)] pub(self) struct Src { + pub(in super) field: Zst, + } +} + +mod dst { + #[repr(C)] pub(in super) struct Zst; + + #[repr(C)] pub(in super) struct Dst { + pub(in super) field: Zst, + } +} + +fn test() { + struct Context; + assert::is_transmutable::<src::Src, dst::Dst, Context>(); //~ ERROR `Src` is private +} |